George Orwell on the written rules of writing

In an essay decrying the abuse of language by politicians and the media, called “Politics and the English Language” (1946), Orwell includes five rules for effective written communication:
(i) Never use a metaphor, simile, or other figure of speech which you are used to seeing in print.
(ii) Never use a long word where a short one will do.
(iii) If it is possible to cut a word out, always cut it out.
(iv) Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.
(v) Break any of these rules sooner than say anything outright barbarous.